Display sign
US6748685B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Oct 21, 2002 |
| Grant date | Jun 15, 2004 |
| Priority date | — |
| Expiry date | Oct 21, 2022 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG09F11/18
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A scroll-type display sign is provided, including a frame, a first fixed shaft connected on the frame, a second fixed shaft connected on the frame parallel spaced from the first shaft, a first scroll roller rotatably mounted on the first shaft, a second scroll roller rotatably mounted on the second shaft, a signage web connected on the first and second scroll rollers, a drive sprocket affixed with the first scroll roller and mounted on the first shaft, a spring sprocket affixed with the second scroll roller and mounted on the second shaft, a constant force spring connected with the spring sprocket to tension the signage web, and a motor torsionally connected with said drive sprocket.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.